677
SYSTEM IMPLEMENTATION OF 3D CITY SIMULATION AND PLANNING AIDED
DESIGN -TAKING YINCHUAN CITY OF NINGXIA HUI AUTONOMOUS REGION AS
AN EXAMPLE
Wang Xiaopeng a ’ * kang gaofeng a Huo Xiaobin a
a Remote sensing Application institute of Aerophotogrammtry & Remote Sensing of China Coal, Xi'an, China -
imagegis@163.com, kanggaofeng@mhyg.net, xb_huo@163.com
Commission V, WG V/4
Keyword: Three-dimensional, City, Integration, Design, Management
ABSTRACT:
Using remote sensing, virtual reality, three-dimensional GIS, database and other key technologies to merge 3D digital elevation
model, satellite orthographic image and 3D stereo model of urban street, building and urban facilities. We reproduce urban
architectures and block landscapes to enable user to see idyllic landscape of urban streets very intuitively on display screen. It can
perform a series of operation such as roam, measure, query, aero-browse and so on, can meet a visualization demand for digital city
technology to develop from two dimensional GIS to three-dimensional virtual reality and can furnish information service of three-
dimensional visualization space geography for city construction planning, community service, property management, fire control
safety, tour traffic and so on.
1. INTRODUCTION
Since Mr. Gore, vice president of United States, presented the
concept of “digital earth” in 1998, “digital earth” has already
become an important stratagem for West Country to impulse
science & technology and economic development. To impulse
economic development in our country, various regions and
various industries also successively present digital region,
digital industry and so on, one of which is “digital city”. By
using the high resolution satellite remote sensing images as the
main information source, combined with the field inspection
numeric photos, the writer of this article and other persons
adopt a traditional modelling tool (3DS MAX) to fabricate the
model of buildings, carry out the secondary development on the
VRMap software platform of Beijing Lingtu Company, with the
case of selective typical block, summarize out a flow of
fabricating 3D city simulation and planning system based on
high resolution satellite image and develop out a suit of
universal simulation and planning aided design system for 3D
digital city.
2. TECHNICAL LINE
Taking the remote sensing image processing technology and
GIS technology as support, by means of the existing image
processing software, GIS software, we realized fabrication and
acquisition of DEM (digital elevation model) data, remote
sensing image and label information data, realized the
fabrication of 3D model data of building, road, street lamp,
parterre, pool and other ground objects using the 3D modelling
software. By data collection and survey collation of attribute
data of ground construction, it carries out an integrative
superposition for the above data in VRMap software finally.
Via programmed on the basis of this software, the secondary
development of user interface and various functional module is
completed to connect with attribute data base of buildings and
other various ground objects to realize 3D browse, information
query, planning and design, specific analysis, 3D flight of route
and other functions. Technical line diagram is shown in figure 1.
3. TECHNOLOGY METHODS
3.1 The application of the high-resolution satellite image
High resolution satellite images mainly provide the spatial
geography information for establishment of 3D digital city of
typical block, provide exact geographic positions of building,
street and other various ground objects and distribution range of
space, green area, water body with different overlay type and
provide information carrier and foundation for 3D digital city
by combining with DEM (digital elevation model). Via fusion
of panchromatic and multispectral images, the adoptive
American Quickbird data can reach the ground resolution of
0.61 meter, with a drawing scale reachable to plane precision of
1: 2000. It can replace a landform map to be used in the region
without a landform map of large scale and has very good
present features at the same time. Because the hypsography of
most city zone is comparatively flat, the landform map of 1:
10000 can be selected as DEM data source.
3.2 3D fabrications for urban buildings
By using 3DMAX software to carry out 3D modeling of
buildings, we changes the numeric photos collected in the field
investigation into orthonormal pictures to match material
quality pictures for the fabricated model of buildings and
generates Simulation model of buildings. Roof texture can be
obtained from the true color high-resolution satellite image.
* Corresponding author. This is useful to know for communication with the appropriate person in cases with more than one author.
